Laboratory Mullite Electrical Insulators
Mullite (3Al2O3·2SiO2) ceramic standoffs and tubes for laboratory high-voltage testing equipment and spark testers. Excellent arc resistance and machinability. HTS 8546.20.00.90 classification.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If non-electrical laboratory porcelainware
Lab ceramics without proven electrical insulation properties use Chapter 69.
If dedicated to instrument housings
Instrument-specific insulators may classify with testing instruments.
Not sure which classification is right?
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Import Tips & Compliance
• Include mullite purity (>99%) and volume resistivity (>10^14 ohm-cm) data
• Specify surface finish (Ra < 0.8μm) for high-voltage applications
Related Products under HTS 8546.20.00.90
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